Snap-fastener.



Gr. A. MUCORMACK.

SNAP FASTENER. APrLIoATI'oN FILED JULY zo. 190e.

933,194. 'Patented sept?, 1909.

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ANDREW, u annum om PkufmLgmomuPnERa. wAsHmnwN. ltr4 C.

UNITED STATES PATENT OFFICE.

GEORGE A. MCCORMACK, OF SOUTH BOSTON, MASSACHUSETTS, ASSIGNOR TO UNITED STATES FASTENER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

SNAP-FASTENER.

933,194. Specifwation f Letters Patent Patented Sept. 7, 1909.

Application filed July 20, 1908.

Serial No. 444,307.

To all whom 'it may concern. a3. A collet b3 having a stud receiving Opeli- Be it known that I, GEORGE A. MCCOR- ing b4, holds the stud engaging spring C MACK, a citizen of the United States, and within the cylindrical casing b', said spring resident of South Boston, in the county of may be loosely secured and free to rotate 60 Suffolk and State of Massachusetts, have within the casing; devices to fix the spring invented new and useful Improvements in in a definite position are unnecessary with Snap-Fasteners, of which the following is a these improvements. The said spring C specification. y comprises central stud gripping arms c My invention relates to snap fasteners and and an integral outer rim o2, the latter being 65 more particularly to that class of snap faspreferably substantially rectangular in teners in which the socket member comprises shape as shown in Fig. 3. The outer rim of a stud engaging spring within a casing. In the spring C has localized centers of flection fasteners of this class as heretofore made, at points c3 symmetrically disposed about the stud engaging spring is not equally rethe central stud gripping arms c so that the 70 silient in all directions and consequently the spring C is equally resilient in all directions pinch of the spring upon the stud is not and consequently the stud gripping arms c uniform so that the tension necessary to pull exert a substantially uniform pinch upon the the stud from the socket is not the same stud and the tension necessary to disengage in all directions. It has therefore been neothe stud is the same in all directions. 75

essary in assembling the parts of these fas- By reason of the fact that the spring C is teners to face the spring in a predetermined equally resilient in all directions, no device position and thereafter to attach the fasneed be provided to prevent rotation of the tener member to fabric or apparel in a defispring within the casing after the parts are nite position so that the stud can be disenassembled; and the fact that the spring may 80 gaged with the desired tension, and also to be left free to rotate, eliminates the necessity provide some means whereby the spring is of painstaking adjustment of the spring prevented from changing its position by rowhen the parts are assembled and of theretating in the casing. This necessity for after attaching the fastener member to matecareful adjustment of the spring has proved rial in a predetermined position. By this 85 a cause of annoyance and expense, not only construction, therefore, the annoyance and because of the necessity of providing some expense incident to the necessity of providdevice to prevent rotation of the spring but ing means to prevent rotation of the spring also because the work of assembling the parts and the retardation of the work of assemis seriously retarded thereby. bling the parts, is wholly eliminated. 90 It is the object of this invention to pro- What I claim and desire to secure by vide a stud retaining device of the kind de- Letters Patent is: scribed wherein the spring is equally resili- A socket member of a snap fastener', ent in all directions, the pinch upon the stud comprising two parts to be seated on opsubstantially uniform, and which will not posite sides of material, one part comprising 95 40 require careful adjustment in the casing but a cap, a disk within said cap, an eyelet inmay rotate therein without detrimental retegral with said disk, the other part comsults. prising an annular casing having an opening Referring to the drawings,-Figures 1 ladapt-ed to receive said eyelet, a studand 2 are respectively sectional views of the engaging spring loosely secured and adapted 100 upper and lower portions of a socket memto turn within said casing and comprising ber; Fig. 3 is a plan view of a stud engaging central substantially circular stud gripping spring; and Fig. 4 shows partly in section arms and an integral substantially rectanguand partly in elevation a snap fastener atlar outer rim, said spring being equally retached to material. silient in all directions. 105

A is the upper section of a socket member Signed by me at Boston, Massachusetts,

and comprisingkatl cap a clenhed oier a this sixth day of July 1908. disk a2, said dis aving an eye et a3 a apted to pass through the material. GEORGE A' MCCORMACK B is the lower section of a socket member Witnesses:

and comprises a cylindrical casing b having E. C. M. Wnnn, an opening b2 adapted to receiveA the eyelet G. A. HOLMES. 

